/*
 * MIT License
 *
 * Copyright (c) 2023 北京凯特伟业科技有限公司
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.je.bpm.engine.impl.bpmn.listener;

import com.je.bpm.engine.delegate.DelegateTask;
import com.je.bpm.engine.delegate.Expression;
import com.je.bpm.engine.delegate.TaskListener;
import com.je.bpm.engine.impl.context.Context;
import com.je.bpm.engine.impl.scripting.ScriptingEngines;

public class ScriptTaskListener implements TaskListener {

    private static final long serialVersionUID = -8915149072830499057L;

    protected Expression script;

    protected Expression language;

    protected Expression resultVariable;

    protected boolean autoStoreVariables;

    @Override
    public void notify(DelegateTask delegateTask) {
        validateParameters();

        ScriptingEngines scriptingEngines = Context.getProcessEngineConfiguration().getScriptingEngines();
        Object result = scriptingEngines.evaluate(script.getExpressionText(), language.getExpressionText(), delegateTask, autoStoreVariables);

        if (resultVariable != null) {
            delegateTask.setVariable(resultVariable.getExpressionText(), result);
        }
    }

    protected void validateParameters() {
        if (script == null) {
            throw new IllegalArgumentException("The field 'script' should be set on the TaskListener");
        }

        if (language == null) {
            throw new IllegalArgumentException("The field 'language' should be set on the TaskListener");
        }
    }

    public void setScript(Expression script) {
        this.script = script;
    }

    public void setLanguage(Expression language) {
        this.language = language;
    }

    public void setResultVariable(Expression resultVariable) {
        this.resultVariable = resultVariable;
    }

    public void setAutoStoreVariables(boolean autoStoreVariables) {
        this.autoStoreVariables = autoStoreVariables;
    }

}
